Leer loader



May 2, 1933. s. B. BowMAN ET AL 1,906,786

LEER LOADER Original Filed May 26, 1928 2 Sheets-Sheet l Summer May 2, 1933. s. B. BowMAN Er AL 1,906,786

- LEER LOADER original Filed May 2.6, 1928 2 sheets-sheet 2 Buvcntor 44 /yamuel l?. .Bow/270,7?,

Bg Vwma@ 'ienzozwe ttorneyf Patented May 1.933

-IJNI'I'ED STATES SAMUEL B. BowMAlm-or zANEsvILLE, omo, AND THoMAs sirENHoUsE, or WASHING- TON, PENNSYLVANIA, AS'SIGNORS T0 HAZEL-A'ILAS GLASS CO., OF WIST VIRGINIA, A. CORPORATION 0F WEST VIRGINIA LEER LOADER Original application led Hay 26, 1928, Serial No. 280,861'.

' A 1931. Serial No. 527,510.

5 leer, from whence it is pushed onto the leer conveyer propel-,and is a division of our application 1` Serial No. 280,861, filed'v May 26, 1928.

One of the objects of 'the invention resides in the provision of a leer loader which is so -designed as to place the ware in the leer in close proximity but out of contact, so asv to prevent the pieces of ware from adherlng to each other due to the relatively high temperthe leer.

Another objectof the invention consists in providing a leer loader in which the pusher bar is longitudinally contractible, being formed of slidable or collapsiblev sections, and which is automatically collapsed prior to the return stroke, so as to clear the oncoming ware on the cross-conveyer. I v

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawings; in which Figure l is a fragmentary horizontal sectional view through a leer showing the loading device installed at the front thereof. Y

Figure 2 is a horizontal sectional view through the contractible pusher bar and its operating mechanism..

Figure 3 is a vertical sectional view through the cylinder for operating the pusher bar and showing in dotted lines the pusher bar extended into the leer.`

Figure 4 is an enlarged fragmentary sectional view of the pusher bar showing the arrangement of the air conduits. y

Figures 5 and 6 are sectional views through the operating cylinder taken on line Y 5 5 and 6 6, respectively, of Figure; and Figure 7 is a transverse sectional view through the pusher bar taken on line 7-7 of Referring to the drawingsin detail the numeral 1designates a leerpreferably provided with a lining of heat insulating mateo rial 2 and a conveyer 3 of conventional type.

ature at which the ware is introduced into on the cross-conveyer as'the pusher bar is Divided and this application led April 8,

The leer 1 is positioned in close proximity to a forming machine ,and disposed adjacent both the forming machine and the leer is a cross-co`nveyer 5 mounted on suitable sprocket wheels or the like supported on bearings 6 and which is operated by a suitable vari.

able speed motor 7 connected to the driving wheel of the cross-conveyer by means of suitable reduction gearing 8. Nunreral 9 (Figures 1 and 3) indicates the usual shadow pan for spanning the space between the crossconveyer 5. and they conveyer 3 of the leer.

One of the primary diificulties'of the pusher bar type or' leer loader is the interferenceof the pusher bar with the oncoming ware withdrawn from the leer. To avoid this difi'culty wehave provided an extension pusher bar indicated generally by the numeral 40, which is comprised of tWo sections, namely, a horizontally disposed cylinder 4l and a plate 42 which is slidably mounted on the front face of the cylinder 41 by means of the dovetail'connection clearly shown in Figs. 3 and 7. Within the cylinder 41 is a piston 43 with which is connected a piston rod 44 WHEELING,

which has its outer end fixedly secured to a boss 45 formed on that end of the late 42 remote from the cylinder 41. It wil thus be.

the hollow piston rod 48 intermediate the ends of the latter; and the rod is provided with-a lateral aperture 52 to permit the pas- Sage of Huid pressure to cylinder 41 at the proper time and in a manner hereinafter described. y

Fluid pressure is supplied to the opposite ends of the cylinder 49 by means of conduits 53 and l54 in which are located suitable valves 55 and 56 operated by cams 5 7 and 58 on the drivefshaft of the cross-conveyer 5. By this means ,it will be apparent that the pusher bar 40 may be` reciprocated into and out of the leerin timed relation Vto the travel of the cross-conveyer. A wall of the cylinder or an enlargement thereof is also provided with a passage 59 extending lengthwise of the cylinder and communicating with annular ports 60 and 61 i` n the heads of the cylinder. This passage is always maintained in communication with the flu/id pressure supply by means of a conduit The boss 46 on cylinder 41 is formed with two passages 62 and 63, the former of which communicates `with the interior ofthe hollow piston rod 48 and one end of'cyl'inder 41. The other passage, 63, connects with 4a conduit 64 in communication with the opconduit 64, to that end of cylinder 41 which is remote from hthe bossf46 and that the usher bar is consequently extended to its ull width. It will `also be noted that when the pusher bar 40 is moved into the leer the port 52 in the hollow piston rod 48 will be brought into communication with the annular port 60, and that fluid. pressure will thus be communicated from conduit 59', through port 60, hollow piston rod 48, and passage 62 to the adjacent end of cylinder 41, thereby forcing piston 43 upwardly (Fig. 2) and retracting the plate 42 by` reason of its sliding connection with cylinder 41.

A complete cycle of operations of thisv part of the leer loader will now be 4described.

A row of properly spaced ware having been brought into alignment with the front of the leer 1 by means of the( cross-conveyer 5, fluid pressure Iis admitted to the rear end of'cylinder 49 by means of valve 56, the operation of which is synchronized with'the conveyer by reason of its cam 58 being driven -by the drive shaft of the conveyer. At this time theP pusher bar is in extended position by reason of the fluid pressure being admitted to that end of cylinder 41 in communication with conduit 64. The extended pusher bar is now moved forward across -the cross-conveyer 5 land pushes a row of the ware from said conveyer onto the leerA conveyer 3. As soon as this position is reached the aperture 52 in hollow piston rod 48 is brought into communication with the annular port which thus allowsiluid pressure to be conveyed through passage 62 to the opposite end of passage 63 with the annular port 61, and the complete cycle of operations repeated. It will be understood, of course, that various adJust'rnents may be made 1n the valves and voperating cang so as to vary as desired the` time of reciprocation of the pusher bar and also the positions at which it is extended and collapsed.

f From the foregoing description and the attached drawings it will be .apparent 'that we have devised a leer loader of the pusher bar type of very simple construction, which -is so operated entirely by air pressure, and

which is so designed as to preclude interference'with the oncoming ware during the return stroke of the pusher bar,

In accordance with the patent statutes we have described what wel now believe to be the preferred form of the invention, but since various minor changes may be made in the details of constructiop without departing from the spirit of the invention it is intended that such changes be included within the scopevof the appended claims.

What We claim is:

1. In combination withV a conveyer for carrying ware across the front of a leer, a leer loader for transferring ware from the conveyer to the leer, including a pusher bar, means for periodically moving the pusher bar toward and from the leer totransfer the ware, means for increasing the length `of the bar prior to its engagement with the ware to be transferred and for thereafter decreasing thelength of the bar.

2. In combination with a conveyer for carrying ware across the front of a leer, a leer loader for transferring ware from the conveyer to the leer, including a pusher bar, means for periodically moving the usher bar toward and from the leer totrans er the ware, means for increasing the length lof the pusher bar to substantially the width 0f the leer tunnel before engaging the ware to be transferred and for reducing thebar to a length materiall less than the width of the:

leer tunnel a ter4 the ware has rbeen transferred.

3. A leer loader including a pusher' bar formed of a plurality of sections, one section being a cylinder and another section being a plate movably mounted with respect to the cylinder, and a piston rod associated with said'cylinder for operating the plate.

4. A leer loader including a pusher bar izo lformed of a horizontally disposed cylinder and a plate slidably connected to said cylinder, anda piston rod associated with said cylinder for reciprocating said plate. y

5. A leer loader including an Iextensible pusher bar, and a Huid pressure system for reciprocating said pusher bar and for extending and contracting the same, said system adapted to first extend the bar then move it forward, then contract the bar, and finally withdraw it from the leer.

6. A leer loader including an extensible pusher bar formed 'of a horizontally disposed cylinder and a plate movably mounted thereon, a piston rod associated with said cylinder for moving said plate, a second cylinder operatively connected to said bark for reciprocating the same, and means for supplying fluid preure to the opposite ends of said cylinders in a predetermined order.

7. A leer loader including an extensible pusher bar formed of a horizontally disposed cylinder and a plate sldably mounted on the forward side of the cylinder, a piston rod associated with said cylinder and having its outer end connected to said plate for extending and collapsing the same, a secposition.

ond cylinder operatively connected to said first-mentioned cylinder for reciprocating the latter, and means for suppl ing fluid pressure to said cylinders in a pre etermined order.

8. A leer loader including an extensible pusher bar formed of a horizontally disposed cylinder and la plate movably mounted thereon, a piston rod associated with said cylinder for moving said plate, a second cylinder, a piston rod in said second cylinder operatively connected to said bar for reciproeating the same, said second cylinder and piston rod provided with a plurality of fluid pressure passages by means of which fluid pressure is admitted to one end of said firstmentioned cylinder when the second-mentioned piston rod is in one position and to vthe opposite end of said cylinderwhen the second-mentioned piston rod is in 'another `SAMUEL B. BOVV'MAN THOMAS STENHOUSE.

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